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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of magnetoelastic anisotropy on properties of Finemet-type microwires
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Effect of magnetoelastic anisotropy on properties of Finemet-type microwires

机译：磁弹性各向异性对Finemet型微丝性能的影响

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摘要

Magnetic properties and DSC peak near Curie temperature, T_C, of amorphous and nanocrystalline microwires with different ratios ρ = d/D were studied. The investigated compositions were close to Finemet-type: Fe_(70.8)Cu_1Nb_(3.1)Si_(14.5)B_(10.6). Fe_(71.8)Cu_1Nb_(3.1)Si_(15)B_(9.1) and Fe_(73.8)Cu_1Nb_(3.1)Si_(13)B_(9.1).The effects of magnetoelastic energy, stored during the Finemet-type microwires fabrication, on hysteresis loops, Tc and heat capacity of Finemet-type microwires were investigated. Hysteresis loops of all as-prepared microwires showed rectangular shape, typical for Fe-rich microwires. As expected, coerciv-ity, H_c, increases with the decrease of the ratio ρ. On the other hand, the change of heat capacity at T_C, ΔC_P, exhibits linear increase with the ratio ρ. This relationship holds for microwires in the initial state as well as after annealing. Glass removal results in considerable change of both H_c and ΔC_P, which reveals the effect of internal stresses. Structural relaxation of microwires results in a shift of T_C calorimetric peak of amorphous phase to higher temperatures, while crystallization leads to peak disappearance. This effect was attributed to the dependency of T_C calorimetric peak on the value of magnetostriction of magnetic phase, which declines to zero with Finemet alloys crystallization.
机译：研究了不同比率ρ= d / D的非晶态和纳米晶态微丝的居里温度T_C附近的磁性和DSC峰。研究的成分接近于Finemet型：Fe_（70.8）Cu_1Nb_（3.1）Si_（14.5）B_（10.6）。 Fe_（71.8）Cu_1Nb_（3.1）Si_（15）B_（9.1）和Fe_（73.8）Cu_1Nb_（3.1）Si_（13）B_（9.1）.Finemet型微线制造过程中存储的磁弹性能量的影响研究了Finemet型微丝的磁滞回线，Tc和热容量。所有准备好的微丝的磁滞回线都呈矩形，这是富铁微丝的典型特征。如预期的那样，矫顽力H_c随着比率ρ的减小而增加。另一方面，T_C处的热容变化ΔC_P随比率ρ呈线性增加。这种关系适用于处于初始状态以及退火之后的微线。玻璃的去除会导致H_c和ΔC_P的显着变化，这揭示了内部应力的影响。微丝的结构弛豫导致非晶相的T_C量热峰移至更高的温度，而结晶导致峰消失。这种影响归因于T_C量热峰对磁相磁致伸缩值的依赖性，当Finemet合金结晶时，磁致伸缩值下降到零。

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